I RECENTLY CHANGED THE HEATER CORE AMP THE CAR ...

  • Tiny
  • Anonymous
  • 1995 GMC Jimmy
  • 160 miles

I recently changed the heater core & the car puts. Out heat, but after a few seconds the vent door closes. I can hold the switch and force it to stay open, but I am afraid to damage something. Is there a part that may be replaced to allow the vent door to stay open while heater is on?

Thursday, November 15th, 2012 AT 5:02 PM

2 Answers

  • Tiny
  • JDL
  • Expert
  • 16,236 posts

Are you talking about the actuator for the dash?

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Thursday, November 15th, 2012 AT 5:27 PM
  • Tiny
  • JDL
  • Expert
  • 16,236 posts

Note the vacuum diagram for hvac. The actuator may be losing vacuum?

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Thursday, November 15th, 2012 AT 5:32 PM

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